Machine for sharpening reaper and mower knives



(No Model.) 2 sheets-sheet' 1.

P.'W1LLIAMS. y Machine for Sharpeningv Reaper and Mower Knives.

' No. 236,287. Patented Jan. 4, |881.

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P. WILLIAMS. Machine vfor Sharpening Reaper and Mewver Knives.

No. 236,287. Patented-Jan. 4.1881.

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iii-iiiimgil l NiTED- STATES PATENT OFFICE..

PORTER WILLIAMS, OF. PLAINWELL, ASSIGNOR OF ONE-HALF TO JAMES A.

' FOSTER, OF DETROIT, MICHIGAN.

MACHINE FOR SHARPENING REAPER AND MOWER KNIVES.

SPECIFICATION forming part of Letters Patent No. 236,287, dated January 4, 1881.

Application filed October 15.1880. (No model.) Patented in Canada March 22, 18,80.

To all whom it may concern Be it known that I, PORTER VV1LLIAMs,a citizen of the United States, residing atPlainwell, in the county of Allegan and State of 5 Michigan, have invented an .Improvement in Machines for Sharpening Mower and Reaper Knives, of which the following is a specification.

My invention relates to improvementsl in 1o those machines inwhich the knife is moved back and forth on a rotating beveled stone.

Myimprovement consists,tirst, in mounting the knife-holder on an oscillatiu g Lshaped lever adapted to impart a reciprocating horizontal 4movement to the knife while it is raised and lowered, thus keeping the knife level whileV it follows the curve ofthe stone.

My improvement consists, further, in cornbining with the lever a vertically and laterally zo adjustable knife-holder.

In orderthatmyinvention maybe fully understood, I will proceed 17o-describe it, with reference to the accompanying drawings, in which- Figure l is a side view of my improved device. Fig. 2 is a top view thereof, showing positions the connterbalance-weight can assume. Fig. 3 is a view of the opposite side of the device, showing the forward position of -3o the knife-holder and lever in dotted lines.

A represents a suitable supporting-frame,

having a lower end, A', and provided with supports B. The elevated portion of the frame A is furnishedwith bearing-blocks o, for the shaft c of a beveled stone, C, and bearingbloeks d, for the shaft d of an L-shaped lever,

D. On the lower portion of the frame are bearing-blocks e, for the shaft e of a driving rag-wheel, E, operating on another rag-wheel,

4o F, on the outer end of the shaft c by means of a chain, G, to impart motion to the stone.

On the inner end of the shaft e is a crankdisk, H, irovided with a slide, I, having holes t', through which works a wristpin, K, adapted to clamp the slide in different positions and Work in a slot, d2, in the outer end of the lever D. j

L is the holder, which receives the knife, M,

to be ground. The'knife is held by suitable 5o clamp-screws l.' l is an upright or standard,A

provided with a socket, Z2, through which passes the supporting-rod a of a counterbalance-weight, N, secured in any desirable position by set-screw n. The rea-r end of the holderL is bifurcated and formed with knuckles Z3, through which is passed a pintle or bolt, o, which connects it with knuckle o of verticallyadjustable box O on the lever D. Space is left between the knuckles Z3 Z3 and o', to permit of the lateral adjustment of the holder, which is held in desired position by set-screw I. The box'O is clamped to the lever D by means of set-screw Q,'working on key g.

By loosening the wrist-pin K and adjusting the slide I to or from the center ot' the crankdisk, knives of different lengths and widths of sections can be ground.

Cog-wheels or pulleys and belt may be user* instead of chain-wheels and belt. f

The knifeholder being adapted to move from side to side, only one side of a section can be sharpened at a time, if desired.'

On turning the rag-wheel E motion is communicated to the crank-disk H, and by chain G to the wheel F and stone O. The wrist-pin K on the disk Hpasses along the slot d2 in outer end of lever D, and moves the lever and knife M back and forth and up and down, so as to follow the curve of the stone.

Having thus described my invention, the following is what I claim as new therein and desire tosecure by Letters Patent:

1. The L-shaped lever D and knife-holder., in combination with driving wheel E and crank-disk H, as and for the purpose set forth.

2. The L-shaped lever D, having slot cl2, in combination with adj ustable slide I and wristpin K of rotating disk H, as set forth.

3. The knifeholder L, laterally adjustable, and vertically-adjustable box O, in combination with the oscillating lever D, as set forth.

4. The combination ot' the laterally-adjustable knife-holder L and counterbalance-weight N o, as set forth.

5. The combination of frame A A', ragwheels E F, chain G, stone G, lever D, and knife-holder L, as set forth.

roeren WILLIAMS. i

Witnesses:

P. J. EDMUNDs, FRANK G. WEsTLAKE. 

